Spring bed-bottom



No Moderl.)

S. S. BURR.

SPRING BBD BOTTOM. No. 316,444. Pamnted` Apr. 28, 1885.-

ihviTnp ET aTns FnTnniT Ormea SANFORD S. BURR, OF VINNETKA, ASSIGN OR TOTHE BUR-R BED COMPANY, OF CHICAGO, ILLINOIS.

SPRING BED-BOTTOM.

"SPECIFICATION forming part of Letters Patent No. 316,444fdated April28, 1885.

Application ilcd October 31, 1883.

.To @ZZ whom, it may concern:

Beit known that I, SANFORD S. BURR, a citizen of the United States,residing at Win netka, in the county of Cook and State of Illinois, haveinvented certain new and useful v Improvements in Spring Bed'- Bottoms,of which I do declare the following to be a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification.

In an application for Letters Patent filed by me on the 10th day ofOctober, 1883, I have described and claimed, broadly, certainimprovements in spring bed-bottoms whereby i 5 all sagging orirregularities of the mattress or of the woven-wire cover on which themattress rests when such cover is employed can be speedily andeffectually remedied by adjusting the spiral springs which lie beneath2o the mattress or cover, and which after long or severe usage are aptto become permanently depressed. In such former application, as also inasecond application filed of even date therewith, the adjustment of thespiral springs was effected by means of adjustable strips on which themovable spring-slats were sustained.

The object of my present invention is also to provide means whereby thecover of the bed-bottom may be kept free from sagging or irregularities.It is to be distinctly understood, however, that although my inventionis illustrated in connection with and is particularly suited tobed-bottoms having wovenwire covers, it is nevertheless applicable,also,where covers of other material are employed, or where the mattressesrest directly upon the springs or slats thereon.

In the accompanying drawings, Figure 1 is a view in perspective (partsbeing removed) of a spring bed-bottom embodying my inven tion. Fig. 2 isa view in transverse vertical section, and Fig. 3 is a detail View ofone of the adjusting-screws.

Over the mattress-frame, consisting of the y side bars, A, and endbars,A, is stretched the cover B of the bedbottom, this cover beingpreferably formed of woven-wire fabric, having its ends secured to theend bars, A', by means of the clamp strips a. Extending across thebed-frame, and attached to the side loars,A,are the supportingstationary strips C,

(No model.)

lin any desired number, which carry the threaded bushings c, withinwhich work the screw-adjusters D, preferably so disposed that thereshall be an adjuster at each side and at the middle of the stationarystrips C. Upon the enlarged ends cl of the adj usters D rest the movableslats E.in number corresponding with the fixed strips C, and carryingthe spiral supporting-springs F, which bear against the under side ofthe cover B, and serve to keep the same tightly stretched. The movableslats are preferably formed of thin elastic material, the free ends ofsaid slats being retained between the guidestrips a2 in manner toprevent the displacement of the slats, without, however, affecting theireasy vertical adj ustment at any desired point.

From the foregoing construction it will be seen that when from long orsevere usage any of the springs have become permanently depressed, andthe cover in consequence is irregular or sags at such points, byproperly operating the screw-adj usters located beneath the depressedsprings said springs will be readily lifted vertically until they bearagain upon the cover, and thus tightly stretch the same. So, also, thetension of the wire cover can be varied at either side, as desired, toaccommodate the bed to the differences in weight of its occupants.

It will be readily understood that modifications of the details ofstructure shown may be made without departing from the spirit of thisinvention. Thus, for example, other lifting-adjusters between thestationary strips and movable slats-such as wed ges, cams, orscrewjacks-may be employed, although I regard the screw-adjusters as thepreferable construction. So, also, without avoiding the scope of theinvention, instead of the stationary strips, brackets may be affixed tothe inner faces of the side bars to support the adj usters on which thespring-slats rest. It will furthermore be seen that in case the mattressrests directly upon the springs or upon the slats thereon, the number ofsprings and adjusti'ng'strips may be increased to extend from end to endof the bed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

IOO

1. In a bed-bottom, the combination, With the main frame and with thecover connected at its endsto said frame, of the movable slats, rthesupportingsprings mounted thereon, the stationary strips, and thevertical adj usters sustained upon the strips and bearing against themovable slats to regulate the position thereof and the tension of thesprings, substantially as described.

2. In a bed bottom, the combination, with the main frame, of the movableslats, the snpporting-springs mounted thereon, the stationary strips,and the verticaladjusters connecting said strips with the movable slats,Whereby the position of the slats and springs with relation to thestrips may be regulated, substantially as described.

3. In a bed-bottom, the combination, with the main frame and with thecover connected v at its ends to said frame, of the movable and zoflexible slats, the supporting-springs mounted thereon, the stationarystrips, and the vertical adjustersconnecting said strips with themovable slats, whereby the position of the slats and the tension of thesprings and cover may 25 be regulated, substantially as described.

In testimony whereof I have hereunto set my hand this26th day ofOctober, 1883.

SANFORD S. BURR.

Witnesses:

GEO. P. FISHER, J r., JAMES H. PEIRCE.

